JPH10250521A - Manufacture of foamy molding article and molding die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method which can mold a foamy molding article to block the opening of a facing correctly by a facing for opening, simply and beautifully, and is molding die. SOLUTION: While a part of a mold surface where the opening of a facing is to be positioned is composed of a movable mold surface 21 movable up and down, a facing absorbing hole 22 for opening is formed on the movable mold surface 21, the movable mold surface 21 is positioned lower than a peripheral mold surface 16 and a recess 19 is formed on a mold surface 15, and after the facing 40 for opening is loaded on the movable surface 21 in the above recess 19, and it is positioned by the side wall 19a of the above recess 19, so as to adsorb the facing 40 for opening to the movable mold surface 21, the facing 40 for opening is made at a specific position by raising the movable mold surface 21, and after that, a facing 30 is provided on the mold surface 15 in order to fit the flange 41 of the facing 40 for opening to its opening 31, and then, the filling and the foaming of a foamy material P are carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a foam molded article and a mold.

[0002]

2. Description of the Related Art As a method for producing a foamed molded product in which the surface of a foam is covered with a skin such as a vinyl chloride resin, a molding die having a cavity in the shape of a molded product is used. A skin integral foam molding method is often used in which a foaming material such as a polyurethane material is injected into a mold and foamed on the back side of the skin, and the obtained foam is integrated with the skin and the opening skin. In addition, in order to maintain the shape of the foam molded article or to hold the foam, the foam molded article may be provided with a core material made of a hard plastic, metal, or the like on the back side of the foam. When such a foam molded article is manufactured by the skin integral foam molding method, a core material is disposed on a mold surface facing the back surface of the skin, and the foam material is foamed.

[0003] In the foam molded article, an opening is formed in a part of the skin, and an opening skin made of a separate member is fitted in the opening, from the viewpoint of function or decorativeness. Some have a structure that is blocked. For example, FIG.
As shown in an instrument panel 70 in FIG. 15 showing a cross section taken along the line BB, an opening 72 for an airbag door is formed in a part of a skin 71, and the opening skin 7 is formed in the opening 72.
3 is formed to form the skin of the airbag door portion D. In the instrument panel 70, as shown in FIG. 16, when the inflator I operates at the time of a collision, the airbag 74 is inflated and the back side of the airbag door portion D is pressed, whereby the opening portion is opened. The foam 75 breaks along the inner peripheral edge of 72, and the airbag door portion D opens. In addition, a flange 71 bent backward is provided on the inner peripheral edge of the opening 72 and the outer peripheral edge of the opening skin 73 of the outer skin 71.
a, 73a are respectively formed, and the flange 7
1a and 73a are brought into contact with each other to improve the appearance at the corresponding contact portion and secure the sealing property when the foam 75 is formed.

[0004] Incidentally, in order to manufacture a foam molded product in which the opening 72 of the skin 71 is closed by the opening skin 73 as described above by the integral skin foam molding method, the surface of the skin 7 is formed on the mold surface of the mold.
It is necessary to arrange the opening skin 73 correctly on the mold surface where the opening 72 of the skin 71 is located.

However, the skin 71 and the opening skin 7
3 is formed by powder slush molding, vacuum molding, or the like, so that it tends to shrink after molding, and slight misalignment due to the shrinkage or the method of disposition on the mold surface occurs in the opening skin 73, and the foaming is correctly performed. There are things you can't do. In particular, the instrument panel 70 having the airbag door portion D
As shown in FIG.
Is formed, there is a problem that the opening of the airbag door portion D is affected even by a slight displacement of the opening skin 73.

The slide plate is projected from the mold surface into the opening along the flange of the opening of the skin, and the side surface of the airbag door is placed on the slide plate to position the airbag door at the opening. A method has been proposed in which a foam is foam-molded while the slide plate is retracted into a mold surface during the foaming. However, in this method, the progress of the foaming reaction is difficult to be constant due to variations in foaming conditions such as mold temperature and foaming raw material temperature. Therefore, the slide plate is set to be retracted after a certain time has elapsed from the injection of the foaming raw material. However, at that point, the foam may have already begun to cure. As a result, the molded product after demolding has a gap corresponding to a slide plate between the airbag door and the opening of the skin, and the appearance may be impaired.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a method for easily and beautifully molding a foam molded product in which an opening of a skin is properly closed with an opening skin. Provides a type.

[0008]

According to a first aspect of the present invention, a skin having a flange bent rearward on an inner peripheral edge of an opening is disposed on a mold surface of a molding die, and the surface of the opening is formed on a surface of the molding die. Is formed with a flange bent to the back side on the outer peripheral edge, and an opening skin that is sized to fit into the opening is arranged, and then a foaming material is injected into the mold, and foaming is performed on the back side of the skin and the opening skin. Forming the foam by forming the foam, the foam, the skin, and the skin for the opening in a method of manufacturing a foam molded product, wherein the movable part capable of moving up and down the mold surface portion where the opening is to be located It is configured with a mold surface and an opening skin suction hole is provided on the movable mold surface,
When the opening skin is arranged, the movable mold surface is positioned lower than the surrounding mold surface to form a recess in the mold surface, and the opening skin is placed on the movable mold surface in the recess to form the recess. After positioning by the side wall and adsorbing the opening skin to the movable mold surface, the movable mold surface is raised to set the opening skin at a predetermined position.

According to a second aspect of the present invention, a skin having a flange bent rearward on the inner peripheral edge of the opening is disposed on the mold surface of the molding die, while the outer surface of the mold surface of the opening is rearward on the outer peripheral edge. An opening skin having a bent flange formed therein and sized to fit into the opening is arranged, and then a foaming material is injected into the mold and foamed on the back side of the skin and the opening skin to form a foam. By doing so, in the method for manufacturing a foam molded product in which the foam, the skin, and the skin for the opening are integrated, the portion of the mold surface where the opening is located is configured by a movable mold surface that can be raised and lowered. An opening skin suction hole is provided on the movable mold surface, the movable mold surface is positioned above the surrounding mold surface when the opening skin is arranged, and the opening skin is placed on the movable mold surface. Opening based on the outer edge of the movable mold surface After adsorption to the movable mold surface a skin for opening performs positioning of the epidermis, characterized in that the opening for the skin to a predetermined position by lowering the movable mold surface.

According to a third aspect of the present invention, in the second aspect, when positioning the opening skin, the repositioning member such as a rod or a finger is applied to the outer periphery of the movable mold surface and the opening skin is arranged along the outer periphery. The positioning of the opening skin is performed by moving the opening skin.

According to a fourth aspect of the present invention, there is provided an opening in which an inner peripheral edge of an opening is formed with a flange bent rearward and an outer peripheral edge is formed with a flange bent rearward so as to fit in the opening. A mold surface on which the outer skin is arranged, and a foaming material is foamed on the back side of the outer skin and the opening skin to produce a foam and a foam molded article in which the outer skin and the opening skin are integrated. In the molding die, a portion of the mold surface where the opening is to be located is constituted by a movable mold surface which can be raised and lowered, and an opening skin suction hole is provided in the movable mold surface, and the opening skin is provided on the movable mold surface. When placing, the movable mold surface is located below the surrounding mold surface, while after placing the opening skin, the movable mold surface adsorbs the skin on the surface and rises to the predetermined position. It is characterized by the following.

According to a fifth aspect of the present invention, the outer skin has an inner peripheral edge formed with a flange bent to the rear side, and the outer peripheral edge has a flange bent to the rear side, and is sized to fit in the opening. A mold surface on which the opening skin is disposed, and foaming material is foamed on the back side of the skin and the opening skin to produce a foam and a foam molded article in which the skin and the opening skin are integrated. In the mold for
When the portion of the mold surface where the opening is to be located is constituted by a movable mold surface that can be raised and lowered and an opening skin suction hole is provided in the movable mold surface, and the opening skin is placed on the movable mold surface. The movable mold surface is located above the surrounding mold surface, while after the opening skin is placed, the movable mold surface adsorbs the opening skin to the surface and descends to a predetermined position. It is characterized by the following.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a cross-sectional view showing an example of a molding die used in the invention of claim 1, FIG.
FIG. 3 is an enlarged sectional view of a main part of the foam molded article according to the first embodiment of the present invention, showing a state in which an opening skin is placed, FIG. 4 is a perspective view showing a part of a mold surface at that time, and FIG. FIG. 6 is an enlarged cross-sectional view of a main part showing the state when the foam is placed, FIG. 7 is an enlarged cross-sectional view showing the main part when the foaming is completed, and FIG. 9 is a perspective view showing an example of a skin for use, FIG. 9 is an enlarged sectional view of a main part showing an example of a mold used in the invention of claim 2, and FIG. FIG. 11 is an enlarged cross-sectional view showing a part of a mold surface at the time of mounting the skin, FIG. 11 is a perspective view showing a part of the mold surface at that time, and FIG. FIG. 13 is an enlarged cross-sectional view of a main part of a molding die during production of a foam molded product according to another example of the second aspect of the present invention.

First, an example of a method for producing a foam molded article according to the first aspect and an example of a molding die according to the fourth aspect used in the method will be described with reference to FIGS. In the following example, a method for manufacturing a skin-integrated foam molded product used for an instrument panel having an airbag door portion as described in the section of the related art and a molding die used for the same will be described. The present invention can be applied to other foam molded articles.

The foam molded article obtained by the manufacturing method of this embodiment has a structure in which a foam 50 and a core material 60 are provided on the back side of the skin 30 and the opening skin 40 as shown in FIG. The skin 30 protects the foam body 50 and improves the appearance, and is made of a synthetic resin or the like formed by powder slush molding, vacuum molding, or the like. As shown in FIG. Is formed. The opening skin 40 closes the opening 31,
It is made of a synthetic resin or the like molded by powder slush molding, vacuum molding, or the like, and has substantially the same size as the opening portion 31. However, the material and color are appropriately determined in consideration of the function, the decoration, and the like. . The inner peripheral edge of the opening 31 of the outer skin 30 and the outer peripheral edge of the outer skin 40 are bent to the back side (opposite to the design surface) in order to ensure the sealing performance when the foam 50 is formed. 3
2, 41 are formed respectively.

The foam 50 is for giving a cushioning property to the foam molded article, and is made of polyurethane or the like. In addition, the core material 60 maintains the shape of the foamed molded product and the foam 5
It holds 0 and is made of a hard plastic, metal, or the like, and is provided on the back side of the foam 50. The core material 60 may not be used depending on the use of the foam molded article.

The molding die 10 shown in FIGS. 1 and 2 is used for producing a foam molded article having the above-described structure. The molding die 10 includes an upper mold 11 and a lower mold 14 which form a molding cavity C when the mold is closed. The movable mold surface 2 is formed on the mold surface 15 of the lower mold 14.
1 is provided.

The upper die 11 is openable and closable with respect to the lower die 14, and has a nozzle insertion hole 13 formed at a predetermined position. In the nozzle insertion hole 13, the nozzle N of the raw material injection device is inserted. Inserted. A core material fixing member (not shown) including a pin for attaching the core material 60 or a suction device is provided on the mold surface 12 of the upper mold 11. The molding die 10 of this example is for closed injection in which the mold is closed and the foaming material is injected into the mold. However, the foaming material is injected in an open state according to the shape of the foamed molded product, and thereafter, It may be used for closed and open injection. In that case, the nozzle insertion hole 13 becomes unnecessary.

The mold surface 15 of the lower mold 14 is a portion where the skin 30 and the opening skin 40 are arranged. The movable portion housing opening 17 has a concave shape at the mold surface portion where the opening skin 40 is arranged. Is formed. The movable portion housing opening 17 is
The movable part 20 having the movable mold surface 21 is accommodated in the movable part accommodating opening 17 and conforms to the outer peripheral shape of the opening skin 40. Movable unit 20 by a cylinder device 25 such as
Is designed to move up and down. Symbol R indicates cylinder device 2
5 rods. As a matter of course, an elevating device of a link type or the like may be used instead of the cylinder device.

The movable portion 20 which can be moved up and down is placed on the movable mold surface 21 when the opening skin 40 is placed on the movable mold surface 21.
As shown by the chain line in FIG. 2 or as shown in FIG.
The movable mold surface 21 is located below the surrounding mold surface 16,
Above the movable mold surface 21, a concave portion 19 which is depressed with respect to the surrounding mold surface 16 is formed. This recess 19
The side wall 19a of the concave portion 19 is used as a positioning portion when the opening skin 40 is placed. On the other hand, after the opening skin 40 is placed, the movable portion 20 is raised so that the movable mold surface 21 is at a predetermined position (in this example, a position having substantially the same height as the surrounding mold surface 16). I have.

The movable die surface 21 is formed with an appropriate number of skin suction holes 22 for openings having an appropriate size. The skin suction holes 22 are provided on the opening skin 40 after the opening skin 40 is placed.
Is properly suction-held on the movable mold surface 21 and is connected to a suction device (not shown) outside the mold via a suction pipe. Reference symbol P1 indicates a nozzle portion of the suction pipe. The mold surface 15 of the lower mold 14 may be provided with a skin suction hole 18 at an appropriate position other than the movable mold surface 21 to be connected to a suction device (not shown) outside the mold. By doing so, the skin 30 can be positioned more accurately during foam molding. Reference symbol P1 is a nozzle portion of the suction pipe.

Next, an example of the method for producing a foam molded article according to the first aspect of the present invention, which is performed using the molding die 10, will be described. First, as shown in FIG. 3, the molding die 10 is opened, and the lower die 14 is
Is lowered by the operation of the cylinder device 25, and the movable mold surface 21 is positioned below the surrounding mold surface 16 by a predetermined distance L1. As can be easily understood from FIG. A concave portion 19 depressed with respect to the mold surface 16 is formed above the movable mold surface 21. The predetermined distance L1 is a value set in consideration of workability, and in this example, the opening skin 4
The height of the flange 41 is substantially the same as the height of the flange 41 formed on the outer peripheral edge.

Next, the opening skin 40 is placed on the movable mold surface 21 of the movable mold 20 so that the back surface thereof faces upward. At this time, since the movable mold surface 21 is located in the concave portion 19 depressed with respect to the surrounding mold surface 16, the opening skin 40 is fitted (inserted) in the concave portion 19, and the concave portion 19 is inserted.
Can be used as a positioning portion of the opening skin 40. That is, when the opening skin 40 is inserted into the recess 19 and is placed on the movable mold surface 21, the outer surface of the flange 41 on the outer periphery of the opening skin 40 abuts against the side wall 19 a of the recess 19, and the opening skin 40. Will be positioned correctly. Therefore, the opening skin 40 is simply inserted into the recess 1.
9 simply and accurately by inserting it into the skin 40 for opening.
Can be positioned.

After placing the opening skin 40 on the movable mold surface 21, the suction device is operated to adsorb the opening skin 40 to the movable mold surface 21 through the opening skin suction hole 22, and the opening skin 40 is closed. To prevent misalignment. Subsequently, as shown in FIG. 5, the cylinder device 25 is operated to raise the movable portion 20 to bring the movable mold surface 21 to a predetermined position. In the figure, the movable mold surface 21 is raised until it becomes flush with the surrounding mold surface 16. Of course, the raised position of the movable mold surface 21 is not limited to this. For example, in consideration of decoration of a molded product, the movable mold surface 21 is formed so as to form a concave or convex at the position of the opening 31 of the skin 30. The position of 21 may be higher or lower than the surrounding mold surface 16.

Next, the surface 30 of the lower mold 14 (movable mold surface) is set such that the back surface of the skin 30 faces upward, and the opening 31 of the skin 30 fits into the flange 41 of the opening skin 40. (Excluding portions), and the flange 32 of the opening 31 of the skin 30 and the flange 41 of the opening skin 40 are brought into contact with each other. At this time, since the opening skin 40 is adsorbed to the movable mold surface 21 by the operation of the suction device, there is no fear of causing a displacement. And, the epidermis suction hole 18
Then, the skin 30 is attracted to the lower mold surface 15 via the base member to prevent the displacement.

It is to be noted that the skin 30 is previously set in the lower mold 14.
After being arranged on the mold surface 15, the opening skin 40 may be arranged on the movable mold surface 21 located below the movable portion accommodating opening 17, but in that case, the flange of the skin opening 31 may be provided. When the movable portion housing opening 17 is
(Concave portion 19), the flange 32
Interferes with the arrangement of the opening skin 40 on the movable mold surface 21, and the workability is slightly inferior. In this case, since the movable mold surface 21 is raised in a state where the skin 30 is arranged on the mold surface 15, the opening skin 40 held around the movable mold surface 21 or on the movable mold surface 21 is raised. The outer surface of the flange 41 comes into contact with the flange 32 of the skin opening 31 to raise the inner peripheral edge of the skin opening 31, or the opening skin 41.
Problems, such as deformation of the flange 41, are likely to occur. Therefore, it is preferable to arrange the skin 40 for opening on the movable mold surface 21 and then arrange the skin 40 on the mold surface 15 as described above, and then raise the movable mold surface 21.

On the other hand, as shown in FIG. 6, the core material 60 is fixed to the mold surface 12 of the upper mold 11 and the upper mold 11 and the lower mold 14 are closed. , The raw material injection nozzle N inserted into the nozzle insertion hole 13 of the upper die 11
More foaming raw material P such as polyurethane raw material,
And it is injected into the molding cavity C between the opening skin 40 and the core material 60. Then, as shown in FIG.
To be integrally fixed to the back surfaces of the skin 30 and the opening skin 40.

After the foam 50 is formed, the mold is opened.
Skin 30, opening skin 40, foam 50, and core material 6
Then, the skin-integrated foam molded product integrated with 0 is released from the mold (not shown).

Next, an embodiment of the method for producing a foamed molded article according to the second and third aspects of the present invention and a molding die according to the fifth aspect of the present invention will be described with reference to FIGS. 9 to 13. . The foam molded article manufactured here comprises the skin 30, the opening skin 40, the foam 50, and the core material 60 having the same configuration as those described in the embodiment of the first aspect of the present invention.

Mold 10A used in the manufacturing method of this example
The movable part 20 provided on the lower die 14A comprises an upper die and a lower die in the same manner as the molding die 10 according to the first aspect of the present invention.
Except for the operation of A, there is no difference from the configuration of the mold 10. Accordingly, hereinafter, the movable mold portion 20A will be mainly described, and the description of the other members and configurations will be omitted. The mold 10 according to the first aspect of the present invention.
The parts having the same names as those shown in FIG.

As shown in FIG. 9, the movable portion 20A
Movable-portion accommodating opening 17A formed at a portion of mold surface 15A of lower mold 14A in which opening skin 40 is arranged.
Is provided to be able to move up and down by a cylinder device 25A. Reference numeral RA denotes a rod of the cylinder device 25A.
The movable mold surface 21A on the surface of the movable portion 20A has substantially the same shape and the same size as the outer periphery of the opening skin 40.

The movable portion 20A is provided with the opening skin 40.
When placing the as shown in FIG. 10 and FIG.
The movable mold surface 21A is located above the surrounding mold surface 16A, and after the placing of the opening skin 40, the movable portion 20A is lowered to move the movable mold surface 21A to a predetermined position (in this example, the surrounding mold surface 16A). (Position of approximately the same height as). The opening skin 4
The outer peripheral edge 23A of the movable die surface 21A positioned above when the “0” is placed is a positioning portion of the opening skin 40. That is, by making the outer peripheral edge 23A coincide with the outer surface of the flange 41 of the opening skin 40 with reference to the outer peripheral edge 23A of the movable mold surface 21A protruding above the mold surface 15A (16A) of the lower mold 14A. The opening skin 40 is positioned.

At a predetermined position of the movable mold surface 21A, an appropriate number of opening skin suction holes 22A of an appropriate size are formed, and the opening skin suction holes 22A are provided with a suction device (see FIG. (Not shown) is connected to the opening skin 40.
(After the positioning of the opening skin 40), the opening skin 40 is attracted to the movable mold surface 21A. Reference symbol P1A denotes a nozzle portion of the suction pipe.

Next, the molding is performed using the molding die 10A.
An example of the method for manufacturing the foam molded article according to the second and third aspects of the invention will be described. In the lower mold 14A, first,
The movable portion 20A is raised by the operation of the cylinder device 25A, and the movable mold surface 21A is positioned a predetermined distance L2 above the mold surface 16A around the movable mold surface 21A as shown in FIGS. The opening skin 40 is placed on the movable mold surface 21A. The predetermined distance L2 is set in consideration of workability, and in this example, is set to be larger than the height of the flange 32 formed on the inner peripheral edge of the opening 31 of the skin 30.

After placing the opening skin 40, the mold surface 16A
The opening skin 40 is positioned with reference to the outer peripheral edge 23A of the movable mold surface 21A located above.
In this example, as shown in FIG. 12, the finger F is applied to the outer peripheral edge 23A of the movable mold surface 21A and the periphery of the opening skin 40 (flange 41) along the outer peripheral edge 23A.
The positioning is performed by correcting the positional shift of the opening skin 40 by moving with. Instead of the finger F, a positioning member (not shown) that can serve as a ruler such as a bar or a flat plate may be moved along the outer peripheral edge 23A of the movable mold surface 21A. Then, by operating the suction device, the opening skin 40 is attracted to the movable mold surface 21A through the opening skin suction hole 22A, and the subsequent displacement of the opening skin 40 is prevented.

Next, the movable unit 20A is lowered by operating the cylinder device 25A to lower the movable mold surface 21A to a predetermined position. In this example, the movable surface 2 is moved by the predetermined distance L2.
1A is lowered, and the movable mold surface 21A is moved around the mold surface 16 around the movable mold surface 21A.
A is the same plane. Of course, the present invention is not limited to this. For example, in consideration of the decorativeness of the molded product, the movable mold surface 21A is formed to have a concave portion or a convex portion in the opening 31 of the skin 30 more than the surrounding mold surface 16A. You may arrange | position at a high position or a low position. Thereafter, the epidermis 30
Is arranged on the mold surface 15A of the lower mold 14A such that the opening 31 of the skin 30 fits into the flange 41 of the skin 40 for opening.

It should be noted that the movable surface 21 of the opening skin 40 is provided.
A, after the movable mold surface 21A is still at a position higher than the surrounding mold surface 16A after being placed and sucked on the outer skin 30A.
May be arranged on the lower mold surface 15A, and then the movable mold surface 21A may be lowered to a predetermined position.

The movable surface 21 of the opening skin 40 is also provided.
Prior to placing on the lower surface A, the skin 30 is previously set on the lower mold surface 1.
5A, and then an opening skin 40 on the movable mold surface 21A.
Is placed, positioned and sucked, and then the movable mold surface 2
1A may be lowered. In this case, the movable mold surface 21A is positioned above the surrounding mold surface 16A,
If the skin 30 is arranged on the mold surface 15A such that the opening 31 of the skin 30 fits into the movable mold surface 21A protruding from 6A, the positioning of the skin 30 can be performed accurately and easily. Moreover, at this time, the flange 41 of the opening skin 40 does not hinder the arrangement of the skin 30.
Further, when the movable mold surface 21A subsequently descends, the skin 30
Even if the flange 32 of the opening 31 abuts against the side surface of the movable portion 20A and a downward force is applied to the inner periphery of the opening 31, the periphery of the opening 31 remains on the lower mold surface 15A (16A).
Because it is supported from below, there is no danger that the skin 30 shifts or wrinkles.

The arrangement of the core material 60 and the subsequent closing of the mold,
The injection of the foaming raw material, the molding of the foam by the foaming thereof, and the demolding of the molded product are the same as those of the embodiment of the first aspect of the present invention, and thus the description thereof is omitted.

[0040]

As shown and described above, according to the first aspect of the present invention, the movable mold surface is fitted into the concave portion formed on the mold surface by descending. Since the positioning of the opening skin can be performed simply by arranging the opening skin on the movable mold surface, the positioning operation can be performed easily, quickly and accurately, and the workability is extremely good.

According to the second and third aspects of the present invention, the movable mold surface is positioned higher than the surrounding mold surface, and the movable mold surface is positioned above the movable mold surface. Since the opening skin is placed, the opening skin can be positioned with reference to the outer periphery of the movable mold surface, and the opening skin can be positioned easily, quickly, and accurately.

Therefore, according to the first to third aspects of the present invention, it is possible to easily and quickly obtain a foam molded product in which the opening of the skin is properly closed with the opening skin. Furthermore, since the obtained foam molded product does not have a supporting slide plate for the opening skin between the flange at the inner peripheral edge of the opening of the skin and the flange at the outer peripheral edge of the opening skin at the time of its production, the foaming pressure depends on the foaming pressure of the foaming raw material. The two flanges are crimped to form no gap, and the appearance is improved. Moreover, a foam molded article having a good appearance can be obtained without being affected by variations in foaming conditions. Therefore, when it is required to position the opening skin very accurately from the viewpoint of the functional surface and the appearance surface, as in an instrument panel in which the opening skin portion becomes the airbag door portion, claims 1 to 5 The invention of Item 3 is extremely useful.

According to the fourth and fifth aspects of the present invention, on the other hand, the opening skin can be easily and quickly and accurately positioned with a simple structure, and the quality is good. A foamed molded product can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a molding die used in the first aspect of the present invention.

FIG. 2 is an enlarged sectional view of a main part thereof.

FIG. 3 is an enlarged sectional view of a main part showing a state in which an opening skin is placed during the production of the foam molded article according to the first aspect of the present invention.

FIG. 4 is a perspective view showing a part of a mold surface at that time.

FIG. 5 is an enlarged cross-sectional view of a main part, showing a skin arrangement during manufacturing.

FIG. 6 is an enlarged cross-sectional view of a main part when the foaming material is injected.

FIG. 7 is an enlarged sectional view of a main part showing the same at the time of completion of foaming.

FIG. 8 is a perspective view showing an example of a skin and an opening skin.

FIG. 9 is an enlarged sectional view of a main part showing an example of a molding die used in the invention of claim 2;

FIG. 10 is an enlarged sectional view of a main part showing a state in which an opening skin is placed during the production of the foam molded article according to the second aspect of the present invention.

FIG. 11 is a perspective view showing a part of a mold surface at that time.

FIG. 12 is an enlarged cross-sectional view when positioning the opening skin in the same manufacturing process.

FIG. 13 is an enlarged sectional view of a main part of a molding die showing another example of the invention of claim 2;

FIG. 14 is a perspective view of an instrument panel integrally having an airbag door portion.

FIG. 15 is a sectional view taken along the line BB of FIG. 15;

FIG. 16 is a sectional view of the instrument panel when the airbag is inflated.

[Explanation of symbols]

 10, 10A: Molding die 15, 15A: Lower die surface 16, 16A: Peripheral die surface 19: Depression 19a: Depression side wall 21, 21A: Movable die surface 22, 22A: Opening skin suction hole 23A Movable die Outer peripheral edge of surface 30: Skin 31: Opening of skin 32: Flange formed on inner peripheral edge of opening of skin 40: Opening skin 41: Flange formed on outer peripheral edge of opening skin 50: Foam P: Foaming material F: finger

Claims (5)

[Claims] 1. A skin having a flange bent rearward on the inner peripheral edge of an opening is disposed on a mold surface of a molding die, and a flange bent rearward on an outer peripheral edge is formed on a mold surface of the opening. By placing an opening skin that is sized to fit into the opening, and then injecting a foaming material into the mold and foaming on the back side of the skin and the opening skin to form a foam, In a method of manufacturing a foam molded product integrating a foam, a skin, and a skin for an opening, a portion of a mold surface where the opening is to be located is constituted by a movable mold surface that can be moved up and down, and the movable mold surface is A skin suction hole for opening is provided, and when the skin for opening is arranged, the movable mold surface is positioned lower than the surrounding mold surface to form a recess in the mold surface, and an opening is formed in the movable mold surface in the recess. And place it on the side wall of the recess. After adsorption of the decided Shi opening for the skin on the movable mold surface, the manufacturing method of the foam molded article, characterized in that the predetermined position for opening the skin by raising the movable mold surface. 2. A skin having a flange bent rearward on the inner peripheral edge of the opening is disposed on the mold surface of the mold, and a flange bent rearward on the outer peripheral edge is formed on the mold surface of the opening. By placing an opening skin that is sized to fit into the opening, and then injecting a foaming material into the mold and foaming on the back side of the skin and the opening skin to form a foam, In a method of manufacturing a foam molded product integrating a foam, a skin, and a skin for an opening, a portion of a mold surface where the opening is to be located is constituted by a movable mold surface that can be moved up and down, and the movable mold surface is An opening skin suction hole is provided, and the movable mold surface is positioned above the surrounding mold surface when the opening skin is arranged, and the opening skin is placed on the movable mold surface to move the movable mold surface. Of skin for opening based on outer peripheral edge After adsorbing the epidermal performs opening the movable die surface, the manufacturing method of the foam molded article, characterized in that the predetermined position for opening the skin lowers the movable mold surface. 3. The method according to claim 2, wherein at the time of positioning the opening skin, a repositioning member such as a rod or a finger is moved around the opening skin along the outer periphery while being applied to the outer periphery of the movable mold surface. A method for producing a foam molded article, comprising positioning the opening skin. 4. An outer skin in which a flange bent to the back is formed on an inner peripheral edge of the opening, and an opening skin formed in the outer peripheral edge to have a flange bent to the rear and fit in the opening. A molding die for producing a foamed molded product in which a foam and the skin and the opening skin are integrated by foaming a foaming material on the back side of the skin and the opening skin, When a portion of the mold surface where the opening is to be located is constituted by a movable mold surface that can be raised and lowered, and an opening skin suction hole is provided in the movable mold surface, and when the opening skin is placed on the movable mold surface, Is characterized in that the movable mold surface is located below the surrounding mold surface, while the movable mold surface adsorbs the skin on the surface and rises to a predetermined position after the opening skin is placed. Mold. 5. An outer skin in which a flange bent to the back is formed on an inner peripheral edge of the opening, and an opening skin formed in the outer peripheral edge to have a flange bent to the rear and fit in the opening. A molding die for producing a foamed molded product in which a foam and the skin and the opening skin are integrated by foaming a foaming material on the back side of the skin and the opening skin, When a portion of the mold surface where the opening is to be located is constituted by a movable mold surface that can be raised and lowered, and an opening skin suction hole is provided in the movable mold surface, and when the opening skin is placed on the movable mold surface, Means that the movable mold surface is located above the surrounding mold surface, and after the opening skin is placed, the movable mold surface adsorbs the opening skin to the surface and descends to a predetermined position. A molding die characterized by the following.